Swivel-joint for electric-light fixtures.



Y G. VOSSBERG.

'SWIVEL JOINT OR ELEGTRU LIGHT FIXTURLS.

MPLIOATION FILED SEPT. ze, 1908.

958.448. Patented May 17, 1910.

WITNESSES.

u .in 1.1 JLLU Dllsllbif GUSTA? VGSSBERG,

FAILEIN I OFFICE.

0F TOLEDO, GHI.

SWIVEL-OIHT FR ELECTRIC-LIGHT FIXTURES.

Patented May 17, 1910. Serial No. 'i5/,982 Y To all whom it may comerse: y

Be it known that I, Gus'rliv Vossnuno, s citizen of the 'United States, residing :it Tolede, in the County or Lucas und. ttete or" Ohio, have inventec'i' certain new and useill Improvements in Swivel-Joints Elettric- Light Fixtures; and I (io deels-.re the tellowing to be a fuit, clear, und exact description of the invention, such will enshle others skilled in the art to which it zipper tains to Insite .and use the seme, reifer-ence heing had to the accompanying dro.Wings7 and( to the figures of reference marlie thereon, which .form a part of this speeiiea-tion.

In swivel-'joints for electric light fixtures, or Wall-eleetroliers, :is ordinarily eonstruetecfl, the inleading und outleuding Twires are led through the swiveled meeting ends ot two pipes or tibes, the Wires being; continuous and unbroken. *lneri one of the pipes or tubes is svvunv very often, one upor I n j other, the result 1s that one or hein t is t out or broken uit, sometimes musing rtireuit or en ere, sud :treqmmty givin3 rise to much trouhie. v

The presenIr invention to un@ its object is to provide means for overcoming the dii'fiieulty here indicated. attain this object by means the devises emi ment et p: iereinetter deserih .if und shown iilustrateri in the accompanying; el in Whiehelevation .my device; Fi. 2, iop phini i w of the' lower one of the contact-rings he 'eineifter referre to), and Fig op the Convex inet-el sheil l, in. ilfce ma, l 23'? with if prete reV-ny ineens er .v posed holt and nut Thesewfo sheie and the tubes site insulated from A further to be deserihed by ineens of nur grs or shells 57 of suitable insulating inuterish and b a tube 6, of iilre material, sufro ,et .ing t ie huit 3. The internal shells 5 nt closely to and revolve with their respective 'outer sheis.

inner shell-parts with their flat adjoining tunes slightly separated. Embedded in or secured to the opposed tunes Vo" the tivo blocks 'if' are two opposed flat metal rings, 8-8, one of the rings being cleft transversely at one side, us at 8, and bent upwardly, as at 8h, so that this portion of the ring will contout with und slide upon the other ring as a brush.

9 is s brass tube or thinible, insulated from the bolt 3 und from the rinfrs 8, and having a flange l0 engaged by o. oinding-screw ll sunk into one of the blocks 7. The opposite end of the tube 9 teleseol'iically envages u short eorrespondino tube 12 having a ange 3 engogeti u hin: ing-screw 14 sunk into the other block '7. The inleodi11g,'say, positive wire is connected with the binding-screw ll und the outleuding positive Wire is con-- nested with the binding-screw M. The electrical connection between these two wires is new rough the teleseoped tubes und l2, their .flanges '10*13. und the binding-screws l-lf bindingen-ew l5 passes through one of the blocks Y? id is engaged by means ot its screw hole 1f with its ring` 8, the other ring being in' like manner connected wi .i u binding-screw passing through its bleek, so hui the negative inlending wire is eieetrieuliy eonneetef with the negative outleading' wire through .he binding-screws 154k) und rings 8.

wiil he seen that thetubes 9-12 may in constant sliding Contact hat the two inleuding le two fmtleuding Wires are, the eontieing tubes and rings,

in electrical. connection; .that

..7 muy he swung arounrl und upon 'the other without twisting' or "tuner effecting either of the wires, 5 ieulty above indicated is ercozne.

described ,any invention, what I desire to secure by Letters Patent (ze-trie light ixnipri. ng' un uternally insulated i, connections which permit one s rotate upon the other, tubes li-parts l2a, with the Connected with said shell-parts, inleadine wires in one or said tubes, outleading wires 1n the other of said tubes, a pair of Contact i rings capable of rotation upon eaeh other with the rotation of the shell-parts, a pair of teleseoped tubes disposed axiall).Y of said shell-parts and said rings, connections 1for one of said inleading Wires and one of said outleading nires with said rings, and een neetions for the other ot' said inlefrdingg` wires and the other ot said outleading` wires with said teleseoped tubes.

2. ln a device of the described eharae'tr. a tuo-part shell, an axially disposed bolt which connects said shell-parts and permits their rotationD one part upon the other, tubes connected with said shell-parts, inleadine' wires in one of said tubes, in the other of said tubes, a pair of insulat ing-bloel s within the shelt and axiallj,v rmv4 oluble, about said a pair of teleseoped tubes surroundingthe, bolt and insulated therefrom, connections between one of said inleading Wires and one outleadine wires bolt7 a pair of mntaetrings upon the adjacentI taees of said bloelfs. i

of said outleadingg wires and said rii'ig's,V and connections between the other of said inleading wires and the other of said outleading Wires and said teleseegied tubes.

JS. ln a device of the described character,

I a pair of shell-seetions7 an axially disposed bolt which rerolublj/ connects said two parts as a shell;` a pair oit insulating` blocks Within the shell and revoluble/vvith lthe shell-parts, a pair ot eontaet-rings upon the adjacent faces of the blocks, a tube siirroundingthe bolt and insulated therefrom and rigid with endroit the blocks, a pair of wires leading;` into one of the,` shell-parts, a pair of wires leading' from the other shell-part conneetions or one of the inleading' and one ot the outleafelingj 'wires with the rings and eonneetions for thel other ot the inleadineand the y other el the urllezuliire- 'wires with said tube.

fn testinioinY whereof ,l atlix my signature in preseure oi wo uitnesses.

tlltlllilv VUSSBERG. 

